Vibrator control device



April 25, 1933. L. .1. WAHL VIBRATOR CONTROL DEVICE Fi led Feb. 1952AUGTZ/ZOf Leo J ZZ/cz/zl Patented Apr. 25, 1933 UNITED STATES PATENTOFFICE LEO J. WAHL, OF STERLING, ILLINOIS, ASSIGNOB TO WAHL CLIPPER-CORPORATION, OF STERLING, ILLINOIS, A. CORPORATION OF ILLINOIS VIBRATORCONTROL DEVICE Application filed February 1, 1932. Serial No. 590,181.

My invention relates to electro-magnetic vibrators and particularly tovibrators for massage implements such asis disclosed in my Patent No.1,832,437. 7

It is the principal purpose of this invention to provide means wherebyto control the stroke efforts of the vibrator so that the forcecommunicated to the massa e implement may be varied to make it most eective for the particular purposes or for the particular tool employed.

It is also a purpose of this invention to provide a device of thischaracter with means to prevent the rattling of the control elements. Inelectro-magnetic vibrators operating on alternating current as this onedoes, the rate of vibration is extremely high being for a 60 cyclecurrent 120 complete vibrations per second. It is essential, therefore,that the parts be properly constructed to prevent rattling if theinstrument is to be of any value.

It is also a purpose of the invention to provide in conjunction with thecontrol device a simple means to limit the scope of the con- 2 trol.

I will describe the preferred form of my invention by reference to theaccompanying drawing wherein- Fig. 1 is a side view of the vibrator withone .wall of the casing broken away and with only the stem of themassage implement included;

Fig. 2 is a bottom'plan view of the vibrator armature; and I Fig. 3 is alongitudinal sectional view centrally through a portion of the vibratorillustrating the'control device.

Referring now in detail to the drawing, the vibrator consistsessentially of a core 5, an armature 6, and a coil 7, the armature beingspring mounted on the core as indicated by the spring 8. The parts thusfar described are housed in a casing 9 which has the extension 10preferably housing the switch, the handle of which is indicated at 11.The conductors to the coil 7 enter the casing through the extension 10and are shown roughly at 11. The member 12 is simply a means for hangingthe vibrator up. The armature 6 as shown carries a stem 13 of a massageimple- 50 ment. The implement itself is not shown since it forms no partof the present invention.

The construction thus far described is substantially that disclosed inmy patent referred to above and is merely given as an illustration ofthe structures to which my invention may apply.

My invention consists in the provision of ameans indicated generally bythe numeral 14 the opening 16 in the armature. The extent to which theportion 18 extends into the armature opening governs somewhat theattractive force of the electro-magnet for the armature. This is due tothe fact that, the portion 18 being a part of the electro-magnet core,the lines of force from it, that is to say that portion of it which iswithin the aperture 16, go directly laterally into the' armature andtherfore exert no pull tending to pull the armature toward the core faceindicated at 19. (See Fig. 3.)

It is evident, therefore, that the effort exerted by the electro-magnetcan be varied within limits by varying the extent to which the portion18 projects into the opening 16 in the armature.

In order to control the position of the member 17, I provide the cap 20preferably formed integral therewith with the hand holds 21 and 22 sothat it may be readily turned. The. housing 9 fits on the reduced neck23 of the member 17 and provides a means whereby the extent to which themember 17 may be screwed into the member 15 is limited. This isnecessary in order to pre vent improper positioning of the member 17 asfor instance withdrawing it too far into the member 15. and creatingsuch a gap as to render the member 15 substantially inefiective so faras attractive effort on the armature is concerned. Also it preventsscrew ing the member 18 so far down that it would pass through andbeyond the armature 6.

In order to prevent rattling of the parts, I preferably split the member17 as indicated by the slot 24 through a substantial part of its lengthand spread the two legs apart so that they have to be sprung together toinsert it in the bore of the member 15. This tension then prevents anyrattling of the member 17 even under the high vibration to which thisdevice is subjected.

From the above description, it is believed that the construction andadvantages of the device will be clear to those skilled in this art.

Having thus described one specific form of my invention, what I claim asnew and desire to secure by Letters Patent is:

1. An alternating current vibrator having a body portion which is madeup of a core, a coil wound on said core and having means to connect saidcoil to an alternating current source and a housing for said core andcoil, said vibrator having an armature extending across the face of saidcore and yieldingly mounted on the body portion to vibrate in responseto the current flow in said coil, said core having a small core sectionthereof movable outwardly into the plane of said armature whereby toadjust the power imparted to the armature.

2. An alternating current vibrator having a body portion which is madeup of a core, a coil wound on said core and having means to connect saidcoil to an alternating current source and a housing for said core andcoil, said vibrator having an armature extending across the face of saidcore and yieldingly mounted on the body portion to vibrate in responseto the current flow in said coil, said core having a small core sectionthereof movable outwardly into the plane of said'armature whereby toadjust the power imparted to the armature, said armature being cutawayto provide passage for said core section and said core sectioncomprising an elongated plug having an adjusting handle at the back ofthe main core.

3. An alternating current vibrator having a body portion which is madeup of a core,

bore.

4. An alternating current vibrator having a body portion which is madeup of a core, a coil wound'on said core and having means to connect saidcoil to an alternating current source and a housing for said core andcoil, said vibrator having an armature extending across the face of saidcore and yieldingly mounted on the body portion to vibrate in responseto the current flow in said coil, said core having a small core sectionthereof movable outwardly into the plane of said armature whereby toadjust the power imparted to the armature, said housing and said coresection having cooperating means to limit the extent of movement of thecore section.

In witness whereof, I hereunto subscribe my name this 15th dayof JanuaryA. D.,

LEO J. WAHL.

a coil wound on said core and having means to connect said coil to analternating current source and a housing for said core and coil, saidvibrator having an armature extending across the face of said core andyieldingly mounted on the bodyrportion to vibrate in response to thecurrent flow in said coil, said core having a small core section thereofmovable outwardly into the plane of said armature whereby to adjust thepower imparted to the armature, said small core section being mounted ina bore provided in the core and being split longitudinally through atleast a III

